BD9G102G-LBTR

Overview

The BD9G102G-LBTR is a non-synchronous buck DC/DC converter from Rohm Semiconductor, designed for industrial applications. It features an integrated power MOSFET supporting input voltages from 6V to 42V and delivers up to 500mA output current. The device operates at a fixed switching frequency of 1.0MHz with a feedback pin voltage of 0.75V ± 2.0%. Output voltage is adjustable from 0.75V to 33.6V. It includes cycle-by-cycle over-current protection, under-voltage lockout, over-voltage protection, and thermal shutdown. The component is housed in a compact SOT-23-6 package and supports an operating temperature range of -40°C to 85°C.

Feature Summary

• Integrates a high-voltage internal N-channel MOSFET rated for 45V breakdown and 800mΩ on-resistance within a single controller package.
• Employs current-mode control with built-in slope compensation to simplify phase compensation design and ensure stable operation.
• Provides comprehensive protection mechanisms including cycle-by-cycle over-current protection, under-voltage lockout, over-voltage protection, and thermal shutdown.
• Features a low shutdown supply current of 0μA and an enable threshold of 1.8V ± 0.1V for efficient power management.

Applications

• Industrial equipment power supplies
• Battery management systems (BMS)
• General-purpose step-down conversion in embedded systems

Procurement Notes

Verify the specific suffix LBTR against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Ensure the procurement source provides valid RoHS compliance documentation. Cross-reference the part number with authorized distributors to avoid counterfeit components. Confirm that the requested quantity matches standard taping quantities if reel packaging is required. Check for any recent lifecycle status updates or recommended replacement notices from Rohm Semiconductor.

Selection Notes

Select this component when a wide input voltage range up to 42V is required in a small form factor. It is suitable for designs needing simple phase compensation due to internal circuitry. Consider the 1.0MHz switching frequency for balancing efficiency and external component size. Verify that the 500mA output current meets the load requirements. Ensure the operating temperature range of -40°C to 85°C aligns with the application environment.

Part Context

The BD9G102G-LBTR belongs to the BD9G series of switching voltage regulators by Rohm Semiconductor. This series targets industrial markets with long-term supply guarantees. It is distinct from synchronous variants like the BD9G101G, which operates at 1.5MHz. The LBTR designation indicates the specific taping configuration for surface-mount assembly.

Replacement Considerations

BD9G101G-TR offers similar functionality but with a 1.5MHz switching frequency and different output voltage range. BD9E151ANUX-TR is another alternative in the broader portfolio. Verify pin compatibility and electrical parameters before substitution.